Shares of Moody's (NYSE: MCO) tumbled after the credit ratings agency had accidentally gave top ratings to debt notes due to a computer error in 2007 according to a Financial Times report.

In the broad market, advancing issues outpaced decliners by a margin
of nearly 10 to 9 on the NYSE and by more than 5 to 5 on Nasdaq. The
Russell 2000 which tracks small cap stocks added a point to 737.